Question

Which of the following cannot be the sides of a right triangle?

400mm, 300mm, 500mm
8cm, 10cm, 6cm
9cm, 5cm, 7cm
5m, 12m, 13m​

Answer 1

Answer:
3
Explanation:
According to pythagoras theorem, the 1,2,4 make a right triangle and 3rd option doesn’t.

Answer 2

Answer:

Your answer is C. 9cm,5cm,7cm

Step-by-step explanation:

Let's check the explanation :-

a)400mm,300mm, 500mm

(400)² = 160000

(300)² = 9000

(500)² = 250000

Now we add two smallest square and compare with third one

90000+160000=250000

This means the sum of two sides is equal to third side. So it ia a right angle ∆.

b) (8)² =64

(10)²= 100

(6)²= 36

Now, add the two sides of the ∆ and compare to its longer side ( hypotenuse)

64+36= 100

So, it is also a right angled ∆.

c) (9)² = 81

(5)²= 25

(7)² = 49

Now add the two side and compare with another.

81+25 = 106

It is not equal to the longer side (100).

So it is not a right angled ∆.

d) (5)²= 25

( 12)²= 144

(13)²= 169

Now add the two sides and compare with its longer side

25+144= 169

It is also a right angled ∆.